File Format Websites
filext.com
FILExt.com is the file extension source. Here you'll find a collection of file extensions; many linked to the programs that created the files. This is the FILExt home page.
76,192 
$ 176,400.00
file-extension.info
File-Extension.info will help you solve the basic issues with file extensions.
60,244 $ 223,200.00
djvu.org
DjVu (pronounced 'déjà vu') is a digital document format with advanced compression technology and high performance value.
176,979 $ 62,400.00